The free-form swimming pool of a ******inium housing estate has a uniform depth of 1.2m, and takes the shape as shown below, to a scale of 1:300. by scaling from the sketch, estimate the amount of water required to fill up the pool to it's full length

I really need help in this because i don't know what to do? I do know that volume = length * height * breadth but is that even correct in this instance?